Sodium Cromoglicate Impurity 9 CAS 3361-18-0
| CAS No. | 3361-18-0 |
| Molecular Formula | C11H14O5 |
| Molecular Weight | 226.23 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a process- or degradation-related impurity, Sodium Cromoglicate Impurity 9 (CAS 3361-18-0, C11H14O5) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Structurally, Sodium Cromoglicate Impurity 9 (C11H14O5) contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 5.0, corresponding to approximately 5 ring(s) or double-bond equivalent(s). With a molecular weight of 226.23 g/mol, it falls into the medium-molecular-weight range. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C11H14O5 |
| Molecular Weight | 226.23 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
Related Sodium Standards
- Sodium Cromoglicate Impurity 10 (CAS 50521-64-7)
- Sodium Cromoglicate Impurity 8 (CAS 16130-28-2)
- Sodium Cromoglicate Impurity C51 (CAS 16130-17-9)
- Sodium Cromoglicate Impurity 12 (CAS CATO-C4X-201112)
- Sodium Cromoglicate Impurity 13 (CAS 53878-47-0)
- Sodium Cromoglicate Impurity 6 (CAS 802857-44-9)
- Cromoglicate EP Impurity A (CAS 699-83-2)
- Sodium Cromoglicate Impurity 30 (CAS CATO-C4X-201130)
Recommended Standards
- Epinephrine /Adrenaline Impurity 118 (CAS CATO-C4X-1849118)
- Olprinone Impurity 5 (CAS 141354-29-2)
- Polaprezinc Impurity 4 (CAS 5853-00-9)
- Metaraminol Impurity 103 (CAS CATO-C4X-2252103)
- Rebamipide Impurity 64 (CAS CATO-C4X-152364)
- Rabeprazole Impurity 22 (CAS 675198-19-3)
- Crotamiton EP Impurity D (CAS 13936-60-2)
- Methyl 4-Bromoindole-7-carboxylate (CAS 1224724-39-3)
- 6-Bromo-2-(trifluoromethyl)pyrimidin-4-amine (CAS 1378259-23-4)
- CK 869 (CAS 388592-44-7)
- 1-(Ethoxymethyl)-5-fluoro-2,4(1H,3H)-pyrimidinedione (CAS 57610-22-7)
- Finerenone Impurity 2 (CAS 2389020-00-0)
- n-(Piperidin-4-yl)hexanamide hydrochloride (CAS 1221722-76-4)
- D-[Ser]11-Semaglutide (CAS CATO-CPTD788629)
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